Electric heating

100% efficient and zero emissions around your property, electricity heats your home the cleaner, modern way.

Carbon savings

Comparing the carbon intensity of electricity, oil, and gas, a recent Guernsey study found electricity generates up to 75% less carbon emissions. This figure takes into account electricity generated at the Vale power station and our island’s imported renewable energy. 

That means an average family could prevent around 3-5 tonnes of carbon from entering the atmosphere each year simply by switching to electric.

Independent advice was sought from UK Carbon Emissions Specialists, WSP, in identifying the figures used in this website. http://www.electricity.gg/verification

Energy saving

Unlike fossil-fuel systems which are around 91% efficient at new, electric heating is practically 100% efficient.

That means no energy gets wasted when converting fuel into the comforting warmth your home needs. And you won’t be paying for the harmful greenhouse gas emissions fossil-fuel heating at home produces. 

Minimise your heat loss

Ever wondered why an old house is colder than a modern house?

A heating system is used to replace the heat lost through the fabric of your property such as walls, windows and roofs. Investing in insultation will reduce your electricity bill and your carbon emissions significantly

Service upgrades

It’s really important to plan ahead and check if your property needs a service upgrade. 

Electricity is delivered to your door through an underground network of cables. Some properties don’t have enough capacity in the existing service cable to supply a new heating system. They will therefore need a service upgrade.  

Your installer can check with Guernsey Electricity by submitting an additional load application if your property needs a cable upgrade

Correct size boiler

One size does not fit all. You may need a smaller boiler heat output than your current oil or gas boiler.

A heat loss calculation will tell your installer how large your boiler needs to be. Any bigger, and your boiler will place unnecessary demands on the electricity network which has implications for other customers wanting to switch to low-carbon heating. 

A larger boiler will make no difference to you, it will only ever replace the amount of heat your property actually loses. And if you choose to insulate your property, you’ll pay for even less electricity to heat your home. 

How much will it cost to run heating in Guernsey?

Heating running cost calculation based on 8100 units a year (As of October 2020):

LPG (Gas): £1,342

Oil: £389

Electric boiler: £776

Electric Air Source Heat Pump: £353

How long will it take to install?

If you’re thinking about making the switch to electric heating, it’s best to get in touch with your preferred installer for a quotation as early as possible. As with a house extension or roof replacement, it takes time but is worthwhile.

This is because your property may need a service upgrade. This is when the mains cable serving your property gets upgraded to give you access to the power needed to support your modern heating system.

Installation time depends on the type of system you need – for example, a whole house system versus installing a panel radiator in a room. 

An average installation takes around 8-12 weeks including installer lead time. Bearing in mind the installation may take longer if a service upgrade is required.

Spring and summer are the best times to have your new heating system installed as you won’t need your heating on.

Is there a special tariff for electric heating customers?


The Superheat tariff is available 24-hours a day for electric panel heaters, electric boilers and underfloor heating. Hot water cylinders and towel rails may also be connected to Superheat if the primary heat source in the property is electric and also connected to Superheat.

You will need a separate meter installed to benefit from the Superheat tariff. Your installer should apply for this but it is worth making sure this gets done. 

If you use electric storage heaters, please be aware these do not use the Superheat tariff as they heat up during off-peak Economy 12 tariff times.

The most cost-effective way to heat water cylinders is by connecting them to your Economy 12 electricity supply via a timer, only heating during the property’s low-rate tariff times

Please click here for the most up-to-date rates.

How much will it cost to install electric heating?

It’s always best to get two quotes for a big investment in your property.

Replacing your gas or oil boiler with electric connected to your existing radiators or wet underfloor heating system is likely to cost roughly £5000.

However, this is just a guide price and your heating installer will give you an exact price according to the size of your property, components required, and amount of labour.

Thinking about switching to electric heating?

It pays to plan ahead. Electrical installations are an investment and can take time to complete. Contact your preferred installer as early as possible to find out what you need to do.

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